反应详情

温度

80 °C

A solution of (1R,3S,5R)-tert-butyl 3-(5-(4-(6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)naphthalen-2-yl)phenyl)-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hexane-2-carboxylate (568 mg), (1R,3S,5R)-tert-butyl 3-(5-iodo-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hexane-2-carboxylate (369 mg, 0.983 mmol), Na2CO3 (313 mg, 2.95 mmol) in DME (10 mL) and water (2 mL) was degassed under vacuum for 10 min. The mixture was heated at 80° C. and then Pd(Ph3P)4 (114 mg, 0.098 mmol) was added under a stream of nitrogen. The reactor was sealed and the heating was pursued further at 130° C. overnight. The DME was removed in vacuo and the crude material was partitioned between EtOAc/H2O. The layers were separated and the aqueous layer was extracted several times with EtOAc. The combined organic extracts were dried over Na2SO4 and evaporated in vacuo. The residue was purified by flash column chromatography (BIOTAGE®), eluting with a gradient of 20 to 100% EtOAc/hexanes, then 5% MeOH/DCM to afford the partially pure (1R,3S,5R)-tert-butyl 3-(5-(4-(6-(2-((1R,3S,5R)-2-(tert-butoxycarbonyl)-2-azabicyclo[3.1.0]hexan-3-yl)-1H-imidazol-4-yl)naphthalen-2-yl)phenyl)-1H-imidazol-2-yl)-2-azabicyclo[3.1.0]hexane-2-carboxylate (277 mg). LC-MS retention time 1.578 min; m/z 699.56 (MH+). LC data was recorded on a Shimadzu LC-10AS liquid chromatograph equipped with a Waters Sunfire 5u C18 4.6×30 mm column using a SPD-10AV UV-Vis detector at a detector wave length of 220 nM. The elution conditions employed a flow rate of 4 mL/min, a gradient of 100% Solvent A/0% Solvent B to 0% Solvent A/100% Solvent B, a gradient time of 2 min, a hold time of 1 min, and an analysis time of 3 min where Solvent A was 10% MeOH/90% H2O/0.1% TFA and Solvent B was 10% H2O/90% MeOH/0.1% TFA. MS data was determined using a MICROMASS® Platform for LC in electrospray mode. 1H NMR (500 MHz, MeOD) δ ppm 7.62-7.69 (m, 6H), 7.53-7.59 (m, 4H), 6.95 (s, 2H), 4.67 (br s, 2H), 3.46-3.56 (m, 2H), 2.50-2.59 (m, 0.5H), 2.32-2.49 (m, 2H), 2.27 (br s, 1.5H), 1.65-1.78 (m, 2H), 1.28 (br. s, 18H), 0.80-0.88 (m, 2H), 0.53-0.66 (m, 2H).

1. customThe reactor was sealed
2. customThe DME was removed in vacuo
3. customthe crude material was partitioned between EtOAc/H2O
4. customThe layers were separated
5. extractionthe aqueous layer was extracted several times with EtOAc
6. dry with materialThe combined organic extracts were dried over Na2SO4
7. customevaporated in vacuo
8. customThe residue was purified by flash column chromatography (BIOTAGE®)
9. washeluting with a gradient of 20 to 100% EtOAc/hexanes